CN110161933A - A kind of adjustable automatic stabilisation sine wave generating device of frequency - Google Patents
A kind of adjustable automatic stabilisation sine wave generating device of frequency Download PDFInfo
- Publication number
- CN110161933A CN110161933A CN201910503342.8A CN201910503342A CN110161933A CN 110161933 A CN110161933 A CN 110161933A CN 201910503342 A CN201910503342 A CN 201910503342A CN 110161933 A CN110161933 A CN 110161933A
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- frequency
- sine wave
- analog converter
- chip microcontroller
- controlled oscillator
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- 230000006641 stabilisation Effects 0.000 title claims abstract description 14
- 238000012937 correction Methods 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
The present invention provides a kind of adjustable automatic stabilisation sine wave generating device of frequency, comprising: single-chip microcontroller, digital analog converter, voltage controlled oscillator and frequency meter.The present invention generates sine wave signal by single-chip microcontroller, digital analog converter, voltage controlled oscillator and frequency meter and forms closed-loop control, the frequency values of sine wave signal according to voltage controlled oscillator output adjust digital analog converter, both the introduced digital noise of direct digital synthesizers had been evaded, make output end that the sine wave of frequency stabilization can be obtained again, drift will not be generated with environmental change；The sine wave spectrum of output is single；Frequency is controlled by digital analog converter, is allowed to through chip microcontroller interpersonal interface, and sine wave freuqency value and voltage value can be configured by single-chip microcontroller and continuously be adjusted.
Description
Technical field
The invention belongs to signal generator technical fields more particularly to a kind of adjustable automatic stabilisation sine wave of frequency to occur
Device.
Background technique
Generating sine wave, there are two types of forms: first, it is generated using Direct Digital Synthesizer digit synthesis；Second,
Simulation oscillation.
The first mode for generating sine wave is that direct digital synthesizers are theoretically by many points
Synthesis sine can be applied high-frequency digital noise on sine wave, and be difficult to be filtered completely, lead to output signal spectrum point
Amount is complicated, and sine wave is impure.
The mode of second of generation sine wave is that the frequency of its output of simulation oscillation will receive power supply
The external factors such as voltage and temperature drift influence and it is unstable, and when low frequency be easy failure of oscillation.Frequency adjusting need to pass through potentiometer.It can not be real
Now with interface microcontroller.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of adjustable automatic stabilisation sine wave generating device of frequency.For
To some aspects of the embodiment of disclosure there is a basic understanding, simple summary is shown below.The summarized section is not
It is extensive overview, nor to determine key/critical component or describe the protection scope of these embodiments.Its sole purpose
It is that some concepts are presented with simple form, in this, as the preamble of following detailed description.
The present invention adopts the following technical scheme:
In some alternative embodiments, a kind of adjustable automatic stabilisation sine wave generating device of frequency is provided, comprising: single
Piece machine, digital analog converter and voltage controlled oscillator；
The single-chip microcontroller is connect with the control signal of the digital analog converter, controls the digital-to-analogue conversion
Device generates DC voltage；
The digital analog converter is connect with the control signal of the voltage controlled oscillator, output DC voltage to institute
State voltage controlled oscillator；
The voltage controlled oscillator, it is sinusoidal for being generated under the control for the DC voltage that the digital analog converter exports
Wave signal, the frequency of the sine wave signal of generation are corresponding with the digital quantity that the single-chip microcontroller exports.
In some alternative embodiments, the adjustable automatic stabilisation sine wave generating device of a kind of frequency, is also wrapped
It includes: frequency meter；The frequency meter and the signal of the voltage controlled oscillator go out output end and connect and defeated with the data of the single-chip microcontroller
Enter end connection, the frequency meter measures the frequency of the sine wave signal of the voltage controlled oscillator output and is uploaded to the monolithic
Machine.
In some alternative embodiments, the single-chip microcontroller includes: difference calculating module and correction module；
The difference calculating module is between the frequency and preset expected frequency value that the frequency meter uploads for calculating
It is no to have deviation；
The correction module, for when the calculated result of the difference calculating module, which is, deviation, changing output to institute
The digital quantity signal for stating digital analog converter, the frequency for uploading the frequency meter is further to preset expected frequency
Value.
The utility model has the advantages that the present invention passes through single-chip microcontroller, digital analog converter, voltage controlled oscillator and frequency brought by of the invention
Rate meter generates sine wave signal and forms closed-loop control, and the frequency values of the sine wave signal according to voltage controlled oscillator output adjust number
Word analog converter had not only evaded the introduced digital noise of direct digital synthesizers, but also has made output end that frequency stabilization can be obtained
Sine wave, drift will not be generated with environmental change；The sine wave spectrum of output is single, and the sine wave signal of generation is purer
Only, stablize, be suitable for the professional domains such as acoustics, physics；Frequency is controlled by digital analog converter, allows to pass through monolithic
Machine realizes interpersonal interface, and sine wave freuqency value and voltage value can be configured by single-chip microcontroller and continuously be adjusted.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the adjustable automatic stabilisation sine wave generating device of frequency of the present invention；
Fig. 2 is the DC voltage of single-chip microcontroller adjustment digital analog converter output of the present invention, and frequency is made to be stabilized in 10kHz
When sine wave waveform diagram；
Fig. 3 is the DC voltage of single-chip microcontroller adjustment digital analog converter output of the present invention, and frequency is made to be stabilized in 15kHz
When sine wave waveform diagram.
Specific embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.
As shown in Figures 1 to 3, in some illustrative embodiments, a kind of adjustable automatic stabilisation sine wave of frequency is provided
Generating device is widely used in the test of loudspeaker production line, judges comprising pure tone detection and polarity.
Sinusoidal wave generating device of the invention includes: single-chip microcontroller, digital analog converter, voltage controlled oscillator and frequency meter.
Single-chip microcontroller, digital analog converter and voltage controlled oscillator constitute sine wave and generate part, for generating sine wave, just
String wave generates part and obtains DC voltage by digital analog converter first, and is generated by DC voltage control voltage controlled oscillator
The sine wave signal of respective frequencies.
Single-chip microcontroller and frequency meter constitute frequency self-stabilization part, and the frequency of measurement sine wave signal is realized in frequency self-stabilization part
Rate, and DC voltage value is corrected by digital analog converter, to stablize the frequency of output sine wave.
Single-chip microcontroller is connect with the control signal of digital analog converter, and control digital analog converter generates direct current
Pressure, the DC voltage of generation is for controlling voltage controlled oscillator.
Digital analog converter is connect with the control signal of voltage controlled oscillator, output DC voltage to voltage controlled oscillator.
Voltage controlled oscillator is connect with the control output end of digital analog converter, for exporting in digital analog converter
DC voltage control under generate sine wave signal, the digital quantity phase that the frequency of the sine wave signal of generation is exported with single-chip microcontroller
It is corresponding.The output frequency of voltage controlled oscillator, digital analog converter corresponding with the DC voltage of digital analog converter output
The DC voltage of output is again corresponding with the digital quantity of single-chip microcontroller output, i.e., the discrete control of single-chip microcontroller voltage controlled oscillator
Output frequency.
Frequency meter goes out output end with the signal of voltage controlled oscillator and connect and connect with the data input pin of single-chip microcontroller, frequency
The frequency of the sine wave signal of meter measurement voltage controlled oscillator output is simultaneously uploaded to single-chip microcontroller.
Single-chip microcontroller includes: difference calculating module and correction module.
Whether difference calculating module has partially between the frequency and preset expected frequency value that frequency meter uploads for calculating
Difference；
Correction module turns for when the calculated result of difference calculating module, which is, deviation, changing output to digital simulation
The digital quantity signal of parallel operation, to correct DAC value, the frequency for uploading frequency meter is further to preset expected frequency value.Frequently
When the voltage controlled oscillator output frequency that rate meter measures is relatively low, DAC value is adjusted upward, until frequency reaches desired value；Make voltage-controlled
Oscillator frequency rises with it；When frequency is higher, then on the contrary.The value of DAC subtracts 1 when frequency is higher, when frequency is relatively low, the value of DAC
Add 1.
Wherein, single-chip microcontroller, digital analog converter, voltage controlled oscillator and the specific workflow of frequency meter are as follows:
S1: DC voltage is generated by single-chip microcontroller control digital analog converter；
S2: the sine wave signal that voltage controlled oscillator generates respective frequencies is controlled by the DC voltage again；
S3: frequency meter measure sine wave signal frequency, and calculate measurement frequency and preset frequency desired value whether
There is deviation；
S4: if the frequency of measurement is deviated with preset frequency desired value, amendment DAC value makes frequency close to preset
Frequency desired value；
S5: circulation executes step S3 and S4, the preset frequency of frequency infinite approach for the sine wave for exporting voltage controlled oscillator
Rate desired value.
It should also be appreciated by one skilled in the art that various illustrative logical boxs, mould in conjunction with the embodiments herein description
Electronic hardware, computer software or combinations thereof may be implemented into block, circuit and algorithm steps.In order to clearly demonstrate hardware and
Interchangeability between software surrounds its function to various illustrative components, frame, module, circuit and step above and carries out
It is generally described.Hardware is implemented as this function and is also implemented as software, depends on specific application and to entire
The design constraint that system is applied.Those skilled in the art can be directed to each specific application, be realized in a manner of flexible
Described function, still, this realization decision should not be construed as a departure from the scope of protection of this disclosure.
Claims (3)
1. a kind of adjustable automatic stabilisation sine wave generating device of frequency characterized by comprising single-chip microcontroller, digital simulation turn
Parallel operation and voltage controlled oscillator；
The single-chip microcontroller is connect with the control signal of the digital analog converter, is controlled the digital analog converter and is produced
Raw DC voltage；
The digital analog converter is connect with the control signal of the voltage controlled oscillator, output DC voltage to the pressure
Control oscillator；
The voltage controlled oscillator, for generating sine wave letter under the control for the DC voltage that the digital analog converter exports
Number, the frequency of the sine wave signal of generation is corresponding with the digital quantity that the single-chip microcontroller exports.
2. the adjustable automatic stabilisation sine wave generating device of a kind of frequency according to claim 1, which is characterized in that also wrap
It includes: frequency meter；The frequency meter and the signal of the voltage controlled oscillator go out output end and connect and defeated with the data of the single-chip microcontroller
Enter end connection, the frequency meter measures the frequency of the sine wave signal of the voltage controlled oscillator output and is uploaded to the monolithic
Machine.
3. the adjustable automatic stabilisation sine wave generating device of a kind of frequency according to claim 2, which is characterized in that described
Single-chip microcontroller includes: difference calculating module and correction module；
Whether the difference calculating module has between the frequency and preset expected frequency value that the frequency meter uploads for calculating
Deviation；
The correction module, for when the calculated result of the difference calculating module, which is, deviation, changing output to the number
The digital quantity signal of word analog converter, the frequency for uploading the frequency meter is further to preset expected frequency value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910503342.8A CN110161933A (en) | 2019-06-11 | 2019-06-11 | A kind of adjustable automatic stabilisation sine wave generating device of frequency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910503342.8A CN110161933A (en) | 2019-06-11 | 2019-06-11 | A kind of adjustable automatic stabilisation sine wave generating device of frequency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111366784A (en) * | 2020-03-19 | 2020-07-03 | 宁波新策电子科技有限公司 | Frequency scanning device with adjustable amplitude |
| CN113049048A (en) * | 2019-12-27 | 2021-06-29 | 比特大陆科技有限公司 | Voltage adjustment method and device and processing equipment |
| CN114071321A (en) * | 2021-10-09 | 2022-02-18 | 太原市华纳方盛科技有限公司 | System capable of adjusting high-voltage sound source |
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| CN1831541A (en) * | 2006-04-14 | 2006-09-13 | 北京航空航天大学 | Multichannel synchronous sinusoidal signal generator |
| CN103217668A (en) * | 2012-01-19 | 2013-07-24 | 黑拉许克联合股份有限公司 | Device with a voltage-controlled oscillator and a circuit arrangement for controlling the oscillator |
| CN104865998A (en) * | 2014-12-10 | 2015-08-26 | 重庆希诺达通信有限公司 | Programmable control single-phase alternating current power supply device |
| CN105511353A (en) * | 2015-12-27 | 2016-04-20 | 哈尔滨佳云科技有限公司 | Low-frequency signal generator and signal debugging method |
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2019
- 2019-06-11 CN CN201910503342.8A patent/CN110161933A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1675823A (en) * | 2002-06-24 | 2005-09-28 | Cts公司 | Controllable SAW oscillator component |
| CN1831541A (en) * | 2006-04-14 | 2006-09-13 | 北京航空航天大学 | Multichannel synchronous sinusoidal signal generator |
| CN103217668A (en) * | 2012-01-19 | 2013-07-24 | 黑拉许克联合股份有限公司 | Device with a voltage-controlled oscillator and a circuit arrangement for controlling the oscillator |
| CN104865998A (en) * | 2014-12-10 | 2015-08-26 | 重庆希诺达通信有限公司 | Programmable control single-phase alternating current power supply device |
| CN105511353A (en) * | 2015-12-27 | 2016-04-20 | 哈尔滨佳云科技有限公司 | Low-frequency signal generator and signal debugging method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113049048A (en) * | 2019-12-27 | 2021-06-29 | 比特大陆科技有限公司 | Voltage adjustment method and device and processing equipment |
| CN111366784A (en) * | 2020-03-19 | 2020-07-03 | 宁波新策电子科技有限公司 | Frequency scanning device with adjustable amplitude |
| CN114071321A (en) * | 2021-10-09 | 2022-02-18 | 太原市华纳方盛科技有限公司 | System capable of adjusting high-voltage sound source |
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Application publication date: 20190823 |